For someone just learning about the Therac-25 incident, what more recent cases would've worked better to foster discussion that can also be read about?

I'd like to learn this too.

But off the top of my head - Facebook and the genocide in Myanmar. The various collosal data breaches that usually have token punishment https://en.wikipedia.org/wiki/List_of_data_breaches

Mass surveillance and face identification by private companies for law enforcement eg https://www.auror.co/role/loss-prevention You can't appeal it and they don't respond to requests for your records (like a government department would).

Social media and addiction to it. How this should be managed with vulnerable groups, eg children?

I'm sure there are numerous better examples out there.